Improvement in locks



TJNITED STATES JOHN COLLINS, OF IIOHOKUS TOWNSHIP, BERGEN COUNTY, NEV JERSEY, -ASSI'GNOR TO HOPKINS d: DICKINSON MANUFACTURING COMPANY.

IMPROVEMENT IN LOCS.

Specification forming peut of Lrtters Patent No. 151,959, datrd Jane 9, 1:7 j

application tiled March 3, 1374.

To all whom it may concern:

Beit known that I, J oHN UoLLrNs, of Hohokus township, county of Bergen, in the yState of New Jersey, have invented new and useful Improvements iu Locks 5 and l do hereby declare that the following' is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon:

My invention consists in the 'combination with the usual frame and catch of a door-lock of two bolts, two key-holes, and one stationary turn-key or knob 5 the whole so constructed and arranged that one bolt can be manipulated at pleasure, either by said knob from within the door, or by a key from without, and the other bolt can be operated by the key only from the inside of the door, as will be hereinafter more fully explained.

To enable those skilled in the art to make and use my improved lock I will proceed to more fully describe its construction and operation, referring, by let-ters to the accompanying drawings, in which- Figure lisa view of one side (that which would be nearest the inner side of the door) of my new lock. Fig. 2 is a view of the opposite side, with most of the side plate broken away, so as to expose toview the interior of the lock. Fig. 3 is another view from the same side, showing the lock applied to a door, and with only small portions ot' the door and side plate of the lock broken away, and with the key inserted, to illustrate how one bolt is operated by both the removable and permanent keys. Fig. 4 is another view ofthe same side of the lock, with both bolts locked, and illustrating how the locking of one of the bolts closes up the key-hole ofthe other.

In the several gures, the same part will be found designated by the same letter of reference.

A is the case or body, and B the face-plate, ot' a mortise-lock, provided or made with the usual catch-lip C, adapted to be operated by the ordinary hand-knobs l), at either side of the door, to which the look may be applied. Below the lip or catch-bolt C of the lock is located a bolt, E, and below this bolt is located another one,`n1arked F, and for the purpose of working these bolts E and F separately by a key two key-holes, g h, are provided, one of which, h, is in the outer side of the lock, and permits the introduction ot' a key, i, from the outsideot' the door, to operate upon the bolt E; the other, g, being located at the inside of the door and lock, so as to permit the introduction from that direction of a key to operate the other bolt F. This lower bolt F can be operated upon only by the key inserted from within into the key-hole g; but the upper bolt E can be manipula-ted either by the key z', inserted from the outside of the door, or by the key xture or knob m, located on the inside oi' the door and this bolt E is so constructed, it will be seen, that when the key is inserted from without into the key-hole h, and left therein, the presence of the key will not at all interfere with the working of the bolt E by means of the key-fixture fm. Upon a stud, o, is mounted, so as to oscillate freely thereon, a plate, p, in which is cut a cam-lfike slot, s, into which projects from the bolt F a pin, t. This pin is about equal in diameter to the width of the slot s, which latter is curved, as shown, and by the forward movement or locking of the bolt F the pin t thereofl so operates upon the plate p in its slot s as to cause it to make about a quarter rotation on its pivot or stud o, and eil'ectually shut-or close up the keyhole h of the other bolt, E.

This operation is clearly illustrated at Figs. 2 and et, in the Iirst of which the plate p is shown in the position wnich it occupies when the lower bolt F is not locked; while in the other ligure said plate is shown in dotted lines in the position it is made to assume by the looking of the lower bolt E.

It will be seen that the bolt E may be locked and unlocked from the outside by the insertion of the key t' into the key-hole h, and from the inside by means of the lixture m; and it will be understood that said bolt can be worked with equal facility by either of' these means or devices at each side oi' the door during the presence in the loe-k of both of them.

Thus, should the door be locked from the outside, and the key left in, a person can readA ily unlock it from within.

By means oi' the protector-plate p, combined as shown, with the lowerl bolt F, it will be seen the only key-hole which appears on the outer side ofthe door is entirely closed when the lower bolt is locked, so that when the door is doubly locked from within there is no way of manipulating either bolt from the outside.

By the combination of the outer key-hole and inner fixture with the bolt E, as shown and described, it will be seen that although the door may be as completely locked from the outside as usual it cannot be so locked from the outside but that it can be opened readily from the inside.

Having so explained the construction and operation of my improved lock that it can be made and used7 and its advantages under- J OIIN COLLINS.

In presence 01- J oHN N. BLAKELEY, HENRY R; WAMUGKER. 

